(19)

(11)

EP 0 494 997 A1

(12)

(43) Date of publication: 22.07.1992 Bulletin 1992/30 (21) Application number: 90916610.0 (22) Date of filing: 06.08.1990

(51) International Patent Classification (IPC):  F03G 7/ 06( . ) F16D 65/ 28( . ) F16D 65/ 14( . ) (86) International application number: PCT/US1990/004379 (87) International publication number: WO 1992/002729 (20.02.1992 Gazette 1992/05)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (71) Applicant: WHITEHEAD, Charles A. Birmingham, AL 35223 (US)	(72) Inventors: WHITEHEAD, Charles, A. Birmingham, AL 35223 (US) GROOM, Kenneth, N. Enterprise, AL 36330 (US) (74) Representative: Iemenschot, Johannes Andreas, Ir.  van Exter Polak & Charlouis B.V., P.O. Box 3241 NL-2280 GE Rijswijk NL-2280 GE Rijswijk (NL)